TOP 5 best pond algae solutions 2022
What are the best solutions for string algae? In this mini-guide, we explain the most effective solutions in 2022. This non-exhaustive list is based on feedback from our clients and our site visits across Belgium and France for treating pond algae.

Here are our treatments for string algae:
- Colombo Algisin: With its enzymatic effect, this solution deprives string algae of nutrients and prevents them from growing. It takes 15 days for this product to prove its effectiveness in your pond.
- Oase Algo Direct : This solution targets areas infected with algae, such as a stream. The algae are treated in just a few hours. The active substance breaks down into components naturally present in the environment. AlGo Direct can therefore also be used in swimming ponds. For safe use, the carbonate hardness should be at least 7 to avoid any risk to your fish.
- Eco AlgControl - Barley straw pellets: Eco AlgControl - Barley straw pellets / The positive effects of barley straw have long been known to pond enthusiasts. But currently, barley straw is hard to find and must be used in sufficient quantities. Fortunately, Eco Algcontrol now exists. This ready-to-use version is highly active thanks to the addition of other natural components that improve pond health, notably willow, humin, and clinoptilolite.
- Aquipond Greenstab: This is a natural product that helps limit algae. It also helps improve water quality. It is an organic product where there is no risk of "overdosing." It blocks the assimilation of the nutrients that algae need to grow. We recommend providing 25g per 1,000 liters of water. If this is the first time you are adding Greenstab this year, we recommend using it twice during the month. As a maintenance dose to control the development of string algae, you can use it once a month.
- Biobooster+ is a formulation designed to boost the activity of beneficial microorganisms in the pond. The effect on organic waste is visible after just a few hours. Biobooster+ will then amplify bacterial growth, leading to the elimination of waste. It contains no products harmful to filtration, the environment, or fish, which will only be more vigorous and healthy. Suitable for swimming pools and ponds.
These treatments for string algae and green water are only effective if the pond's water parameters are correct. It is essential to test these parameters before any water treatment: pH, GH, KH & NO2.
If the carbonate hardness (KH) is not high enough, which is often the case after heavy periods of rain, you must use a solution like KH+ to remineralize the pond. Once you have gotten rid of these algae, preventive treatments like GREENCONTROL or GREENSTAB used throughout the season will prevent them from returning.
Les produits conseillés par nos experts
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Aquipond BactoClay Montmorillonite Clay 2kg – Improves Water Quality and Koi Carp Health
€43,95
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Minerall in One Aquipond - Increases GH & KH simultaneously - 2.5KG to treat 30M³
€53,90
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Sera Aqua-Test Set - The essential analysis kit for ponds and aquariums
€38,07
Aquipond KH+ 1kg - Increases Carbonate Hardness (KH)
€21,95
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